Siemens HQR23B125HL 125A 3-Pole 240 V Circuit Breaker

Meet the Siemens HQR23B125HL 125A 3-Pole 240 V Circuit Breaker, a purpose-built protector for three-phase electrical systems. With a 125 A current rating, three poles, and a 240 V rating, it’s engineered to deliver reliable, coordinated protection for your distribution panels and equipment.

Core specifications

• Part Number: HQR23B125HL
• Current rating: 125 A
• Poles: 3
• Voltage rating: 240 V

Why this Siemens breaker stands out

• Three-pole protection for balanced three-phase systems, ensuring simultaneous disconnection across all phases when protection trips.
• Built by Siemens to align with Siemens panels and electrical distribution architectures, offering reliable coordination with existing protection schemes.
• Durable construction designed for steady performance in commercial and light-industrial environments.

Ideal use cases

• Protects three-phase feeders and motors up to 125 A in commercial panelboards and distribution boards.
• Suitable for HVAC equipment, conveyor lines, and other 3-phase machinery in small-to-medium facilities.
• Good fit for upgrade or replacement projects where a proven Siemens 3-pole, 240 V protector is required.

Installation and compatibility tips

To maximize safety and performance, verify that your panel supports HQR-series breakers and that the overall load and bus ratings align with the 125 A rating. Follow manufacturer torque specs and local electrical codes during installation. When replacing an existing breaker, ensure a correct match in pole count (3-pole) and voltage rating (240 V) to maintain proper protective coordination.